Offsetting Assets and Liabilities (Details 2) (USD $) In Millions, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Derivatives
Gross Amounts of Recognized Liabilities	$ 4,089	$ 4,370
Securities loaned
Gross Amounts of Recognized Liabilities	209	136
Securities Loaned Not Offset Financial Instruments	(56)	(15)
Securities Loaned, Collateral, Right to Reclaim Cash	0
Securities Loaned, Collateral, Right to Reclaim Securities	(147)	(117)
Securities Loaned, Net	6	4
Repurchase agreements
Gross Amounts of Recognized Liabilities	50	50
Total
Gross Amounts of Recognized Liabilities	4,654	4,994
Gross Amounts Not Offset in the Consolidated Balance Sheets
Financial Instruments	0	0
Cash Collateral	0	0
Securities Collateral	(50)	(50)
Net Amount	0	0
Derivative Liability Securities Sold Under Agreements to Repurchase Securities Loaned Not Offset Financial Instruments	(3,026)	(3,262)
Derivative Liability Securities Sold Under Agreements to Repurchase Securities Loaned Collateral Right to Reclaim Cash	(1)	(2)
Derivative Liability Securities Sold Under Agreements to Repurchase Securities Loaned Collateral Right to Reclaim Securities	(1,603)	(1,665)
Derivative Liability Securities Sold Under Agreements to Repurchase Securities Loaned Net	24	65
OTC
Derivatives
Gross Amounts of Recognized Liabilities	4,365	4,786
Gross Amounts Not Offset in the Consolidated Balance Sheets
Financial Instruments	(2,941)	(3,227)
Cash Collateral	0
Securities Collateral	(1,406)	(1,498)
Net Amount	18	61
Over the Counter Cleared Swaps [Member]
Derivatives
Gross Amounts of Recognized Liabilities	30	22
Gross Amounts Not Offset in the Consolidated Balance Sheets
Financial Instruments	(29)	(20)
Cash Collateral	(1)	(2)
Securities Collateral
Net Amount
Total Over the Counter Derivatives [Member] [Member]
Derivatives
Gross Amounts of Recognized Liabilities	4,395	4,808
Gross Amounts Not Offset in the Consolidated Balance Sheets
Financial Instruments	(2,970)	(3,247)
Cash Collateral	(1)	(2)
Securities Collateral	(1,406)	(1,498)
Net Amount	$ 18	$ 61